Aren’t all opinions purely subjective?
Purely? I wouldn’t say that. Opinions don’t appear in a vacuum. Some are well-supported by facts, while others are not.
For example, if one person were to assert that DAC A is clearly better than DAC B, while another were to assert the opposite, it might well be fair, absent any other information, to say that both opinions were purely subjective.
But if DAC A was cheap, measured poorly, and had never received a positive professional review, while B was much more expensive, built to a much higher standard, measured extremely well, and received glowing reviews, would those two opinions remain "purely" subjective?
Of course someone could form the opinion that a ’73 Ford Pinto is a superior car when compared to a ’73 Porsche 911s, but when the weight of the related facts reaches a significant level, the "purely subjective" claim is likely to lead to a false equivalency.